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#!/usr/bin/env python
"""Stitch together the letsencrypt-auto script.
Implement a simple templating language in which {{ some/file }} turns into the
contents of the file at ./pieces/some/file except for certain tokens which have
other, special definitions.
"""
from os.path import abspath, dirname, join
import re
from version import certbot_version, file_contents
DIR = dirname(abspath(__file__))
def build(version=None, requirements=None):
"""Return the built contents of the letsencrypt-auto script.
:arg version: The version to attach to the script. Default: the version of
the certbot package
:arg requirements: The contents of the requirements file to embed. Default:
contents of dependency-requirements.txt, letsencrypt-requirements.txt,
and certbot-requirements.txt
"""
special_replacements = {
'LE_AUTO_VERSION': version or certbot_version(DIR)
}
if requirements:
special_replacements['dependency-requirements.txt'] = ''
special_replacements['letsencrypt-requirements.txt'] = ''
special_replacements['certbot-requirements.txt'] = requirements
def replacer(match):
token = match.group(1)
if token in special_replacements:
return special_replacements[token]
else:
return file_contents(join(DIR, 'pieces', token))
return re.sub(r'{{\s*([A-Za-z0-9_./-]+)\s*}}',
replacer,
file_contents(join(DIR, 'letsencrypt-auto.template')))
def main():
with open(join(DIR, 'letsencrypt-auto'), 'w') as out:
out.write(build())
if __name__ == '__main__':
main()
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